uh.... no
your friends get deported because there is a paper trail and the immigartion department knows where they live
ILLEGAL mexicans don't get deported "1 day" after their time is up.... oh wait they don't have anything filed so immigration can't do shit unless they do the workplace raids or whatever and catch them
BTW i don't believe your friend would actually have agents showing up at their door ready to deport them one day over their visa time.. they might have a notice but that's about it